宾语从句的一道选择题
Ourteacheraskedme.
A.whatwasAnndoingthesedays
B.whyPeterdidn'tcometoschoolthedaybeforeyesterday
C.whenwillthedolphinshowbegin
D.howlongdidIspendonmyhomework
选B,翻译一下,再讲一下为什么?谢谢!